Another type of rich media advertising on Facebook is a post of an image. This is one of the most popular types of ads ever since Facebook began favoring visual content. The optimal size for News Feed photo ads is at least 1080 x 1080 pixels, otherwise your image will get cropped. Adjust your image based on the target audience's needs and by what will appeal to them the most.
Facebook will do whatever it can to protect itself from losing its users. Which represent Nearly $10B a quarter in advertising revenue. Sure the advertisers are paying that bill but without users to click the ad, Facebook would not have the revenue. And Facebook is much more interested in protecting the user experience than it is in your ad dollars. Facebook Pixel Purchase and Conversion Tracking with GTM | Part 3
It's visual. The picture alone is worth a thousand words about how much fun this concert would be. Not only is it on the beach, it was also taken on a gorgeous day and the stage looks amazing. Also, it clearly represents what to expect during the event, and it catches the eye as someone scrolls through their News Feed. (The beautiful ocean water definitely helps.) Facebook Marketing For Individuals - How to succeed With Facebook Marketing